Lock-out switch for party telephone-lines.



PATENTED DEC. 10, 1907.

0; P. FORSBERG.

, LOCK-OUT SWITCH FOR. PARTY TELEPHONE LINES.

APPLICATION FILED OOT.5, 1906.

. lkaz/erafory G am/1i Tiarsfiezy. W

1m 873,362. I PATENTED DEC. 10, 1907.

k 0. F. FQRSBERG.

LOCK-OUT SWITCH FOR PARTY TELEPHONE LINES.

' APPLICATION FILED 00T.5, 1906.

2 SHEETS-SHEET 2.

. into pl ing the "device whereby any party line may be connected UNrrEn s'mrns' Pair OSC'AR F. FORSBERG, OF CHICAGO, ILLINOIS, AssIeNon TO WESTERN ELECTRIC COM-BANY.

Enron,

OF CHICAGO, ILLI NOIS, AQORPORATION OF ILLINOIS.v I

1101s, have\invented a certain new and useful. Im rovement in Lock-Out Switches for Party elephone-Lines, of which the following is a full, clear,

conclse, and exact descript1on..-- v My invention relates to a lock-out switch for party tele hone lines, and has for its object to provi e an improved and simplified two or more stations of a for con versation to t e exclusion of other stations on such line.

' The improvements of my invention are applicable to a switching device wherein an electromagnetically operated ste ping lever isarranged when rocked in one direction to advance a ratchet, which, as it leaves normal position, opens the talking circuit of the station where the same is located. When the ratchet has been advanced a number of steps corresponding to the number of the station where it is located, mechanism is brought ay to cause the stepping arm when given a movement in'the opposite direction to close contact springs to complete the talking circuit of the station in question. The ratchet may then beadvanced to the end of its movement, when it will bring into service mechanism which, when the lever is caused to againrock in said opposite direction, at the termination of the conversation, will cause said lever to release the ratchet, which thereupon returns to normal position, open said contact springs, and restoring the normally existing talking circuit.

y invention is directed towards improvements in the means for operating the contact rings when the stepping lever is rocked in e opposite direction, after the ratchethas eenadvanced a predetermined distance, and also towards theprovision of improved s t b means for causingthe ratchet at the end of its release by the I its movement, to effect movement of the stepping lever in the said opposite direction; f

preferabl provide anarm, operated by the ratchet a ter being advanced a predetermined distance, adapted to cause the stepping lever in its reverse movement to actuate contact mechanism. Said arm is again operated by the ratchet at the end of its movement, and the arm thereupon causes the step- Specification of Letters Patent. Application filed an... a 1906. Serial No. 337.510.

ping lever, when 'ating lever;

LOCK-OUT SWITCH FOR PARTY TELEPHONEYLINES.

. Patented Dec, 10, 1907.

given another reverse im ulse, to remove the retaining mechanism om the ratchet, and ermit the restoration of the device to norma condition.

A feature of the invention consists in renmeans by which the dering adjustable the ratchet operates said arm to cause the stepping lever to operate said contact mechanism, so that the ratchet may be caused to o erate the arm at any desired point in its a vance.

- I will describe my invention more particularly by reference to the accompanying drawings, which represent an embodiment of my invention, reserving, however, for the appended claims a statement of the arts, improvements and combinations .whlch I consider novel with me.

In the drawings, Figure 1 is a front View of a switching device embodying my invention; Fig. 2 is a side View thereof; Fig. 3 is a front view, with the arm operated to bring the foot I of the stepping lever into position the o crating lever of the contact springs, and showing the stepping lever rocked in a direction to cause the foot to move said oper- Fig. 4 is a partial front vie w showmg the arm operated to bring the foot into position to engage the finger of the retaining pawl, with the stepping lever rocked to cause to engage said foot' to move sa1d finger and remove the retaining pawl from the is a detail vert' of Fig. 3.

The same letters of reference are used to designate similar parts wherever they are shown.

A polarized electromagnet -1 is ratchet; and Fig. 5

cal sectional view on line 5-5 provided with a tilting armature 2 which controls the rockin of the stepping lever 3 of the ratchet 4, sai lever 3 carrying a stepping pawl adapted to engage the teeth of said ratchet when the lever 3 is rocked in one directionto the left in Fig. 1. An arm 5 is pivoted of the device, and is a apted to be operated by the ratchet 4 when advanced a predetermined distance to cause the stepping lever 3, when rocked in a reverse direction-that is, to the right in Fig.

1to actuate contact mechanism which may control the talking circuit at the station where the switch islocated. Said amsm may comprise s rings 6 adapted to be closed by arocking ever 7. The lever 7..

carries at its npper'end an angular pfle'ction contact mechis erases 8 adapted to be engaged by a sliding foot 9 p the rate let 4, and adapted to be engaged by a spur 12 secured 1 to-the ratchet and projecting into the path of said pin. Said spur is arranged to be set at'any desired position in the path of said pin so as to engage the same at any desired oint in the advance of the ratchet and roe r the arm 5 to cause the same to lift the foot 9 and bring the same into operative relation to a projection 8 of the operating lever 7, so that when the stepping lever 3' is moved to the right the lever 7 will be operated to close contact springs 6.

The

' spur 12 may be loosely mounted on the shaft of the ratchet 1, and a binding screw 13 is arranged to iass through a concentric slot 14 in the rate et to secure the spur to said 'ratchet and cause the same to project into the path of pin 10 at any desi ed point. Thus if the'switehing device were located at station No. of a party line, the spur 12 would be set to ,engage the pin 10 when the ratchet had been advanced four steps. It should be stated at this point that each station of a partyline employing such a lock-out system wou d be provided with a switching device, and theratchets of all the switching devices would be simultaneously 0 erated; and it will be seen that when suc ratchets have been advanced'four steps the arm 5 at station No.. 4, alone, would be operated to bring the foot 9 into operative relation to the p '0 ierating lever 7 of the contact springs 6, so

tia't when the levers 3 of the switching devices are operated in a reverse direction, that is, to the right in Fig. 1, the contact springs 6 at station No. 4, alone, would be operated.

A spring actuated retaining pawl 15 is provided for the ratchet, said pawl having a fin' ger 16 extending upwardly parallel to the opcrating lever 7, and having an angular aroleetionl? lying above the projection 8 o the ever 7, and the arm 5 is arranged. to be operated, by the ratchet at the" end of its movement to bring the foot 9 into operative relation to the projection of saidfinger 16, where- 1 by when the stepping lever 3 is again rocked to'the'irightthe reta ning pawl 15 will be removed lfrom engagem'entwith said. ratchet 4' and the same permitted to return to normal condition under the influence of a spring 18. d When the ratchet'reaches the end of its movement the in 10 carried upon arm 5 --rides' up onto a s oulder 19 at the end of the slot 11 and said arm' 5 lifts the foot 9 into operative relation to the projection 17 of finger 16, so that the lever 3 may operate the re taining pawl 15. The contact spring 210 is arranged to be engaged by the ratchet at the end 0 its movement.

The ratchetis now restored to normal condition by the spring 18, and as the same com-' pletes its return movement a pin 21 carried thereby engages a stud 22 earned by the operating lever 7 of springs 6, and restores said lever and springs to normal condition. A lug 23 carried by the ratchet 4 is adapted when the ratchet is in normal position to engage a spring 24 and force the same into 0on tact wit its anvil. 'A stop 25 is carried by the ratchet to limit the return movement thereof.

The operation of the device may be briefly her of the station where the same is located,

forexample, four steps for station N0. 4' of-a party line, the spur 12 will engage the pin 10 and lift the arm 5, thereby bringing the foot- 9 into operative relation to the projection 8 of the operating lever 7. -The magnet 1 in res onding to current of opposite direction roe s the lever 3 to the right, causing the foot' 9 to rock the lever 7 and closespri'ngs 6, which may complete the talking circuit at the station where the switch is located. The magnet 1 will new rock the lever 3 to the left and continue the advance of the ratchet 4, and when said ratchet has reached the end of its movement the pin 10 will ride up upon the shoulder 19 and rock the arm 5 far enough to bring the foot 9 of the lever 3 into 0 erative relation to the projection 17 of the in er 16 of the retaining pawl, as shown in Big. 4. Now the arm 3 may be rocked to the right and the foot 9 will operate finger 16 and remove the retaining pawl from the ratchet 1-, whereupon said ratchet is returned by its sprin 18 to normal condition. The lever 3 woul be given this movement to the right at the end of the conversation.

I claim:

1. In a switchin device, the combination with a ratchet, "0 an felectromagnetieally operated stepping lever therefor, said lever when rocked in one direction advancing said ratchet, contact mechanism, an arm operated by said ratchet when advanced'a predetermined distance, to cause said lever when rocked in the op osite direction to actuate said contact I'nec anism, and retaining mechanismfor said ratchet, said arm being operated by said ratehetjat the end of its lot "ement to cause said .lever when rocked .in aid opposite direction to operate said remechanism and'rcleasc said ratchet. 2f a' switching device, the combination ,iti'with a ratchet, or, an electromagnetically-' operated stepping" leverp said lever when 1': fiance of said ratch et-, oontact springs; a le 1 ivelreda ted to}; eiateisaid sprm s, an arm in operate byjsa ratchetwhen a vanc'ed a I V I redeterminedjdistance, to cause said stepping-lever when rocked in the opposite direc-- .tion to, actuate said second-mentioned lever, a. spring-actuated retaining pawl for said b-ratchea nd a finger carriedby d pawl, 'd arm being operated'by "said ratchet at the e'ndof itsmovementto cause saidsteplever-When rocked in said opposite idiip? 9 v,move' said Q, ,eas dratchet. H j a Switching. evice,.tlge combination wit it-ratchet, ,an electro agneticallff ted stepping lever a apted i whe'n ckedw. in one direction to advance said thegeforgafoot Inovab ly mounted upon said step ing; -.l,ever, -means" operated by said ,gfi etiwhen advanced a predetermined disngage nd operate said second-mentioned thel opposite, direction, a retaining pawl said-ratchet, and means operated by said cl et atthe end of its movement for mov- "said foot into position to operate said recan saith. fen-when rocked in .the opposite teflinectlon aiming said foot'to cause the same.

.. =1;g =3gjgrat said second-mentioned lever, and.

"a; a 'ainin 'pawlfor said ratchet, a finger car-. ,ried. there v, and means operated by said 1' tchet at the end of: its movement for operfii gsaid arm to cause the same to bring foot into operative relation to sai whereby when the stepping lever is "sit; sequently'rocked in said opposite directitan, said foot will engage said finger and re $60. ovesaid pawl from said ratchet.

5L In a switchin device, the combination th aratchet, '0 an electromagnetically .l operated' stepping lever therefor adapted when rocked in one direction to advance 265, said ratchet, contact mechanism, afoot iipon 0 ed in one direction controlling thead-' finger and pawl an'd'j re- {5 atcliet contactsprin s, anoperating levermoving said foot into position to ever-pponthe rocking of the stepping lever.

aning pawl upon the movement of said said stepping lever, and anarm operated by the ratchet when advanced apredetcrmined distance to cause said foot, when the lever is rocked in the. opposite direction to actuate said contact mechanism. 4

-6. Inaswitching device,-the combination with a ratchet, of an 'electromagneticaily operated stepping lever for said ratchet, contact springs, an operating lever for said springs,;-a movable foot carried by said stepping lever, and an arm operated by the ratchet When advanced a predetermined distance 'to move said foot into operative relation to said operating lever; whereby .when said steppingjlever is rocked in an opposite direction said foot will movesaid operating jlever and actuate said springs.

' 7. In a switching device, the combination with a ratchet provided with a slot, of an electromag'netically operated, stepping lever for said ratchet adapted when rocked in one direction to advance the same, contact mechanism, an arm having a pin riding in said slot in saidratchet, said arin when operated being adapted to cause the stepping lever when rocked in the opposite direction to actuate said contact mechanism, and a spur carried by-said ratchet adapted hen the same has been advanced. a predetermined distance to engage said pin and operate said arm. 8. In a switching device, the combination with a racthet provided witha slot, of an electromagnetically-operated stepping lever adapted when rocked in one direction to advance said ratchet, contact mechanism, an arm adapted when operated to cause the said stepping leverwhen rocked in,,an opposite direction to actuate said contact mechanism, a pin carried by said arm riding in .said slot in said ratchet, a spur secured to said ratchet and projecting into the path of said-pin to engage the same when the ratchet has been. advanced to a predetermined position and operate said arm, said spur being adapted to be secured to said ratchet in different. positions; whereby the s or may be caused to operate said in an arm at any .desired point in the a Vance of the ratchet. 9. In a switching device, the combination with a ratchet provided with two concentric slots,,of a shaft therefor, an electromagnetic: ally-o erated stepping-leveradapted, when rocke' in one irection to advance said ratchet, contact mechanism, an arm adapted when operated to cause the stepping lever in its reverse movement to actuate, said contact mechanism, a in carried b .saidarm riding in one of sai slot's;i n sai ratchet a spur loosely mounted on said. shaft, said spur being adapted to engage said'pin and operate said arm, and a binding screw adapted to pass throu h the other of said slots insaid ratchet an secure said spur to the ratchet to cause the same to project into the pathof 130 said pin and engage the same at any desired point in the advance of the ratchet.

'10. Inv a switching device, the combination with a ratchet, of an electromagnetically-operated stepping lever therefor adaptcd when rocked. in one direction to advance said ratchet, contact springs operated by said, ratchet when in its normal position, an armto erated by said ratchet when advanced a pre eterinined distance, contact mechanism a'ctuated by the stepping lever when a rocked in a reverse direction under the con-.

trol of said arm, contact s rings operated by the ratchet at the end 0 its movement, a. retaining pawl for said ratchet, said arm being operated by said ratchet at the end of its 1 movement to .cause said lever when subsequently rocked in said op osite direction to rem o've said retainingpaw from said ratchet.

11*. In a switching device, the combination with a ratchet, of an electromagnetic- I ally-(i erat ed stepping lever adapted when rocker in one direction to advance said i ratchet, contact springs, an operating lever the end of its movement to cause said step- L )im lever when'recked in said 0 osite direction to move said retaining pawl from said' f a ratchet, a stud carried by the operating lever of said springs, means for restoring said ratchet to normal conditlon, and a pin car- 7 v ried by said ratchet adapted as the same re- -turns to normal position to engage said stud and restore the said operating lever and springs to normal condition.

I 12. In a switching device, the combination with a ratchet, of an electromagnetically o erated ste p'ing lever adapted when rocker in one irectlon to advance said ratchet, contact s rings, an operating lever therefor, a movab e foot upon said stepping.

Iremovefd from said ratchet.

lever, an arm operated by said ratchet when opprative relation to said operating lever;

w ereby when thestepping lever is rocked in the "opposite direction said rocking lever will be caused to actuate said springs, a retaining )awl for said ratchet, a finger carried therey, said'arm being operated by said ratchet" at the end of its movement to move said foot into operative relation to said finger; whereby when the steppin lever is again rocked in a reverse direction t e retaining pawl will be 13. In a switching device, the combination with a ratchet provided with a concentric slot, of an electroinagnetieally-o erated stepping lever adapted when roc red in one direction to advance said ratchet, contact springs, an operating lever therefor, a sliding foot on said step ing lever, a pivoted arm, a pin carried thereby riding in said concentric slot in said ratchet, a spur carried by said ratchet adapted to engage said pin at a predetermined point in the advance of said ratchet and rock said arm, said arm beingadapted to move said foot into operative relation to said operating lever; whereby when the stepping lever is rocked in ,the opposite direction said operating lever will actuate I said springs, a retaining pawl for said ratchet, a finger therefor, and a shoulder formed at the end of said slot upon which said pin rides when the ratchet completes its movement to rock said arm and bringsaid sliding foot into operative relation to said finger; whereby when the stepping lever is subsequently rocked in said opposite direction the retain ing pawl will be removedfrom said ratchet.

In witness whereof I, hereunto subscribe my name this 2nd day of October A. 1).,

, OSCAR F. FORSBERG. Witnesses:

RAY. T. ALLOWAY, JOHN G. ROBERTS. 

